Performance Max: what to prepare before you switch it on

A Google Ads Performance Max campaign is not a button you press to go faster. It is a system that optimises very hard and very fast on whatever you feed it. Fed well, it covers ground that Search alone cannot reach. Fed badly, it spends your budget on conversions that are not really conversions.

What a Performance Max campaign actually does

Performance Max is a campaign built around a goal, not a channel. It gives you access to all of the Google Ads inventory in one go (Search, Display, YouTube, Discover, Gmail and Maps) based on the assets and settings provided in the campaign or the account: images, product data feeds, bidding goals and audience signals. That is how the official Google Ads documentation on Performance Max describes it.

In practice, Google automatically combines the assets you provide to build ads, and picks the channel and the moment to serve them based on your estimated likelihood of converting. A Search campaign with an exact match keyword still takes priority when a query matches that keyword exactly, but if your Search campaign is limited by budget, Performance Max can occasionally serve on those same terms. So the two campaign types overlap: they are not sealed off from each other.

One setting is worth knowing about before you launch anything: text customisation, which lets Google generate headlines and descriptions from your landing page, is switched on by default when you create the campaign. Google explains that these generated texts only show when they are predicted to perform better than the ones you supplied, and that they are regenerated at least every 48 hours. You can turn it off in the campaign settings if you want to keep control over every headline.

Who it is for, and who it is not for

Here are the points I recommend having ready before launch. They are management recommendations, not a requirement for the account to be a certain age:

• your account has a clear conversion goal (online sales, contact form, store visits);
• you have checked that the conversions that matter are being reported correctly, with the right values;
• you have images, text and, for e-commerce, an up-to-date product feed;
• you want to extend your reach beyond what your Search campaigns already cover.

I recommend fixing the following problems first, rather than expecting the campaign to fix them for you:

• the account is new and nobody has checked the goals or the conversion tracking yet;
• nobody has checked that the conversion tracking counts the right actions, at the right amounts;
• you want fine control over the exact queries that trigger your ads;
• you have no images, no text and no feed to provide, only a landing page.

Google offers a Performance Max journey for new users and states that a campaign can be created without conversion tracking, possibly with limited spend. So account history is not a universal entry requirement. My advice is still to set up and test your measurement so you can judge the results.

What it changes for your budget

Performance Max uses automated bidding and is run with goals and a campaign budget, with no CPC to set keyword by keyword. The budget is set at campaign level, and in the campaign review panel Google shows up to three daily budget levels (low, medium and high), calculated from your settings and the account’s history, each with a matching performance forecast.

Choose a budget your business can sustain and keep a regular eye on the results. Google describes possible fluctuations during the learning period and recommends avoiding frequent or large changes to budget, bids and targeting. That does not mean leaving it to run unchecked: if the tracking is broken or the spend looks inconsistent, look into the problem and step in.

The checklist before you switch on a Performance Max campaign

Seven checks, in this order, before you click create.

1. Conversion tracking. Check that the actions being counted are the right ones, at the right amounts, and test that they are reported before you rely on the results.
2. Available assets. Gather your images, your text and, for a shop, an up-to-date product feed in Merchant Center.
3. Brand exclusions and negative keywords. Prepare them before launch, not after you have seen the first reports.
4. Text customisation. Decide whether you leave it on by default or turn it off to keep control over every ad headline.
5. Audience signals. Pull together what you already know about your customers (lists, website visitors) to guide the initial learning.
6. Starting budget. Choose a level you can sustain over several weeks, not the bare minimum just to test.
7. The tracking report. Decide who looks at the results each week and on which metric, before the campaign runs on its own.

My take

The problem is almost never Performance Max itself. It is the account that switches it on hoping it will make up for sloppy conversion tracking or a complete lack of structure on the Search side. The algorithm optimises on what you give it to measure: feed it bad conversions and it will very quickly go looking for more bad conversions.

When I manage an account, I prefer to test Performance Max after checking the measurement and clarifying the role of the existing Search campaigns. That is a management recommendation, not a condition Google imposes on new accounts. An account that has never put that foundation in place is a topic I cover in detail in my guide to visibility on Google Ads (in French). And if what is really holding you back is the time managing the account takes you, rather than the choice of campaign type, I can help you put a figure on it: get in touch.

Frequently asked questions

Does Performance Max replace my Search campaigns?

No. An exact match Search keyword takes priority if the query is identical to it and the campaign is eligible, in particular with enough budget. So that priority is not absolute. Performance Max can add to the coverage of your Search campaigns.

How much budget does a Performance Max campaign need?

There is no universal figure. Google can suggest up to three daily budget levels in the campaign review panel, calculated for your account. Use these forecasts as reference points, then choose a budget that fits your means and your goals.

Can Performance Max run without a Merchant Center product feed?

Yes, a product feed is only required for goals tied to selling a catalogue online. For a lead generation goal, images and text are enough as the core assets.

How do I keep control over the queries that trigger my ads?

Use brand exclusions, account-level negative keywords and search themes to steer the algorithm, rather than hoping for keyword-by-keyword control as in a standard Search campaign.

What happens if I launch Performance Max without reliable conversions?

The algorithm still optimises, but on a poor-quality signal. The risk is not that the campaign fails to run, it is that it dutifully spends your budget on actions that are worth nothing to your business.